<p>In "The Square Emerald," Edgar Wallace crafts a captivating mystery filled with intrigue and suspense, showcasing his signature blend of vivid characterization and intricate plotting. Set against the backdrop of early 20th-century London, the narrative unfolds with a gripping pace as it delves into the murky world of crime and deception. Wallace's sharp, evocative prose not only paints a visually rich tapestry but also reflects the social tens...